Radiator



UNITED STATES EDWARD '1. CURRAN, 0F DETROIT, MICHIGAN.

RADIATOR.

Specification of Letters latent.

Patented Sept. 6, 1921.

Application filed December 23, 1918. Serial No. 267,900.

T 0 all whom it may concern:

. Be it known that I, EDWARD T. CURRAN, a citizen of the United States,residing at Detroit, county of WVayne, State of Michigan, have inventeda'certain new and useful Improvement in Radiators, and declare thefollowing to be a full, clear, and exact description of the same, suchas will enable others .skilled in the art to which it pertains to makeand use the same, reference being had to the accompanying drawings,which form a part of this specification.

My invention relates to radiators for airplanes and automobiles anddevices of like character and it consists in the construction andcombination hereinafter specified. It pertains particularly to that typeof radiator which is made of flattened steel tubes opening into headersabove and below the same with which said tubes communicate and whichtubes are welded at their meeting edges and also to the headersrespectively.

In the drawings:

Figure 1 represents the rear elevation of such a radiator.

Fig. 2 is a section al view on the line Y-Y Fig. 1.

Fig. 3 is a section on the line XX of Fig. 2.

Fig. 4: is a perspective view of a few of the tubes and the arrangementand manner of supporting the same.

Similar letters refer to similar parts.

In the drawings A represents the upper header, or tank, into whichthetubes open; '13 represents the lower tank into which the lower end ofthe tubes also opens. C C represents the tubes. These tubes are formedby bending sheet metal back upon itself forming a space between them;the two edges that are brought together are welded at C, see Fig. 3,forming a flattened tube. At the lower rear corners of said tubes at C Cthey are welded together and welded to the header B. The lower frontcorners C (Fig. 2) are also welded to the header'B, see Fig. 4c. Theupper front and rear corners C and C are welded to the header A. To formthe tube space and prevent the tubes from collapsing knobs are welded onthe inner face of the metal, as shown at C in Fig. 3 so that when themetal is folded back upon itself to be welded at C the knob approachesor touches the opposite wall of the tube and spaces the walls apart asshown at C. These knobs are also shown in Fig. 2 at C C which is asectional drawing through the center of one of the tubes on the line YYof Fig. 1. These welded on knobs prevent the tubes from collapsing.Across the rear edges or where the tubes are welded to fashion them, aline of autogeneous welding is shown at D which spaces the tubes andprevents their coming in contact with each other and closing off the airpassages therethrough, also acting as a stay by fixing rigidly theirrelative positions.

At E, Fig. 2, is the inlet pipe and F is the outlet pipe for the coolingwater to the engine. The inlet pipe has a shield or is turned downwardlyat E so as to more effectively direct the entering current of waterdownward into the cooling tubes C C. G is the filling cap which is ofthe usual construction.

WVhat I claim is:

1. An autogeneous welded radiator comprising an assemblage of flattenedsteel tubes, and knobs formed of separate material from that of thetubes welded on the interior flat surfaces of said tubes and bridgingthe space between opposite faces of the tubes to prevent collapsing,substantially as described.

2. An autogeneous welded radiator, comprising a series of flattenedsteel tubes formed by folding sheet steel upon itself and welded at itsmeeting edges, an upper and a lower header, each welded to the series oftubes, a strip extending transversely of the tubes and welded to theedges of the tubes, thereby forming an autogeneous cross welding wherebysaid tubes are braced and their proper spacing maintained, and the wholeformed into one autogeneous welded structure, substantially asdescribed.

3. A radiator comprising ,fiat, substantially parallel sheet metaltubes, narrow strips or rods extending transversely of the tubes andwelded to their front and rear edges, whereby the spacing of the tubesis maintained, and the tubes and strips rigidly united to form anintegral structure.

In testimony whereof, I sign this specification.

EDWARD T. CURRAN.

